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Appendix 7: Key Components of an Inspection Checklist

Provided below is a broad summary of the key components of a checklist for the inspection and assessment of on-site wastewater management system performance. It is not exhaustive and does not contain the level of detail necessary to fully assess systems. It is provided here as a guide to the possible structure of such a checklist.

  • Property details − location, owner details, identification/consent numbers, type of facility and estimated occupancy/wastewater generation.

  • Inspection details – date, time, weather, inspector.

  • Wastewater management system summary – type of system (treatment, dosing, land application), location (including site sketch and GPS log), management regime (eg, owner maintained, service agent, utility managed), and any relevant discharge consents.

  • Site and soil (environmental) risk factors – a brief summary of the general site and soil characteristics (section size, slope, soil category, depth to limiting layer).

  • Drainage pipework assessment – a visual check to determine the condition and configuration of drainage (eg, is greywater separate? where are the different fixtures draining to?).

  • Treatment and conveyance component assessment – this may include dimensions, estimated or known operating capacity, physical condition of components, treatment process assessment, sludge and scum accumulation, and stormwater infiltration.

  • Land application system assessment – this may include the dimensions and estimated or known operating capacity, physical condition (vegetation cover, compaction), assessment of the condition of components (broken pipework, pumps and controls), hydraulic failure (observed signs of failure, load testing), proximity to sensitive receptors (such as streams, drains, recreational areas).

  • Summary assessment of performance – a listing of conclusions on the key performance criteria and a statement of any remedial works required.